Vertical-Cavity Semiconductor Optical Devices
First Claim
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1. An optical device, comprising:
- (a) an active semiconductor region configured to provide gain to signal light passing through said active region;
(b) a signal-light reflector arranged to reflect the signal light through the active region in a direction out of the plane of the active region;
(c) a pump-light reflector arranged to reflect pump light so as to form a pump standing wave in the device; and
an absorber configured to absorb light at a wavelength of the signal light and located at a position in the device at which there is no or substantially no pump light.
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Abstract
An optical device comprises: an active semiconductor region (130), for providing gain to signal light (170) passing through said active region (130); a signal-light reflector (120), for reflecting the signal light (170) through the active region (130) in a direction out of the plane of the active region (130); a pump-light reflector (120), the pump-light reflector (120) being arranged to reflect pump light so as to form a standing wave (160) in the device; and an absorber (191) that absorbs light at a wavelength of the signal light. The absorber (191) is arranged at a position in the device at which there is no or substantially no pump light.
35 Citations
27 Claims
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1. An optical device, comprising:
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(a) an active semiconductor region configured to provide gain to signal light passing through said active region;
(b) a signal-light reflector arranged to reflect the signal light through the active region in a direction out of the plane of the active region;
(c) a pump-light reflector arranged to reflect pump light so as to form a pump standing wave in the device; and
an absorber configured to absorb light at a wavelength of the signal light and located at a position in the device at which there is no or substantially no pump light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An optical device, comprising:
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(a) an active semiconductor region configured to provide gain to signal light passing through said active region;
(b) a signal-light reflector arranged to reflect the signal light through the active region in a direction out of the plane of the active region; and
(c) an absorber located in a position in the device selected to control absorption of pump light by the absorber.
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21. A method of engineering an optical device, the device comprising:
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(a) an active semiconductor region configured to provide gain to signal light passing through said active region;
(b) a signal-light reflector, arranged to reflect the signal light through the active region in a direction out of the plane of the active region; and
(c) an absorber;
the method comprising the step of controlling absorption of pump light by the absorber comprising selecting a position for the absorber in the device.
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22. An optical device, comprising:
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(a) an active semiconductor region configured to provide gain to signal light passing through said active region;
(b) a signal-light reflector arranged to reflect the signal light through the active region in a direction out of the plane of the active region; and
(c) a pump-light reflector arranged between the signal light reflector and the active region. - View Dependent Claims (23, 24)
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25. An optical device comprising:
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(a) an active semiconductor region configured to provide gain to signal light passing through said active region;
(b) a signal-light reflector arranged to reflect the signal light through the active region in a direction out of the plane of the active region;
(c) a pump-light reflector arranged to reflect pump light so as to form a pump standing wave in the device; and
an element, arranged in the pump standing wave, effective to absorb pump light to provide gain to the signal light, the element being arranged at or near to an antinode of the pump standing wave. - View Dependent Claims (26, 27)
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Specification